Hmmm. Weather delays on flights out of ACI are so common (even if small) that whenever I fly ACI-GCI-LGW or vice versa I leave about an hour, at least. Aurigny itself won't put you on a connecting booking of less than an hour, for a reason. Probably best to leave the bigger gap and then to go to the desk and ask if you can get a seat on the earlier flight if you arrive on time.